Switching system testing



May 27, 1969 F. G. DENEND SWITCHING SYSTEM TESTING Sheet of 47 Filed March 5, 1966 mopumdm @am ATTORNEV sheet Z y May 27, 1969 F. s. DENEND SWITCHING SYSTEM TESTING Filed March 5, 1966 May 27, 1969 F. G. lDEM-:ND

SWITCHING SYSTEM TESTING Sheet Filed March 5, 1966 on mv mv S @e mv Sheet i o1' 47 May 27, 1969 F. G. DENEND SWITCHING SYSTEM TESTING Filed March s, 196e sheet of 4v May 27, 1969 F. s. DENEND- SWITCHING SYSTEM TESTING Filed March 5, 1966 5825. Se: m 1 ,.1 3 2. L DE m Ol? Ba' w murio m 1 r m @ESSO A 555mm @28m E H F F All m 2 A O L I..- x am w A w ...E I m 2 h x SEQ @z SzSo m OI No; 1 :a: 55m le F E F F W a @l L n .0: m w GIOIA? l 2 x23.. fri m a F m d? a/ E .F .P L 22322285 Q .w\b`

May 27, 1969 F. G. DENEND SWITCHING SYSTEM TESTING G of47 Sheet Filed March 5, 1966 May 27, l969 F. G. DENEND SWITCHING SYSTEM TESTING Sheet Filed March 3. 1966 Q @Pi May 27, 1969 F. G. DENEND SWITCHING SYSTEM TESTING of V47 Sheei'l Filed March 3, 1966 mm .QC .55.200 mooumo o May 27, 1969 F. G. DENEND SWITCHING SYSTEM TESTING Sheet Filed March 5, 1966 QZCZDOU mii .S15

Sheet of 47 May 27, 1969 F. G. DENEND SWITCHING SYSTEM TESTING Filed March 5. 1966 sheet //4 of 47 May 27, 1969 F. G. DENEND SWITCHING SYSTEM TESTING Filed March 3, 1966 May 27, 1969 F. G. DENEND SWITCHING SYSTEM TESTING Sheet 4 /2 of 47 Filed March 3. 1966 May 27, 1969 F. G. DENEND SWITCHING SYSTEM TESTING sheet /3 A or 47 Filed March 5. 1966 May 27, 1969 F. G. DENEND 3,446,921

SWITCHING SYSTEM TESTING` Filed March 5, 1966 sheet 6 of 47 May 27, 1969 F. G. DENEND SWITCHING SYSTEM TESTING Filed March 5, 1966 u I 2T T 29 H WJ EE Gmc# v o Nw Q mw E s if@ Sheet. 7 of 4'? YO! N v m o F. G. DENEND SWITCHING SYSTEM TESTING May 27, 1969 Filed March s, 1966 May 27, 1969 F. G. DENEND SWITCHING SYSTEM TESTING Sheet of 47 Filed March 3, 1966 Sheet /9 of 47 Filed March 3, 1966 Iutm am A SKl/ @am 5m? 5/ n CE om? .la OWL@ @wam 6:5 98% IL u rLTI Em. Em W L am l v m E8 ,.IFII. i. il i3 Gol @OOC

Guru

fll I May 27, 1969 F. G. DENEND 3,446,921

SWITCHING SYSTEMy TESTING Filed March s, 1966 sheet 0 of 4'; 

1. A TESTING CIRCUIT FOR TESTING REGISTER-SENDERS IN A SWITCHING SYSTEM WHEREIN A REGISTER-SENDER IS ARRANGED WHEN SEIZED TO REGISTER ADDRESS DATA TRANSMITTED THERETO AND IS AUTOMATICALLY EFFECTIVE INCIDENT TO ADDRESS DATA REGISTRATION (1) TO DERIVE A SET OF SWITCHING DATA FROM AT LEAST A PORTION OF SAID ADDRESS DATA, (2) TO REGISTER SAID DERIVED SET OF SWITCHING DAT, AND (3) UPON REGISTRATION OF A COMPLETE SET OF SWITCHING DATA TO PERFORM SWITCHING CONTROL FUNCTIONS IN ACCORDANCE WITH SAID REGISTERED SWITCHING DATA, SAID TESTING CIRCUIT COMPRISING: (A) MEANS SETTABLE TO ESTABLISH TEST ADDRESS DATA AND A CORRECT SET OF SWITCHING DATA PERTINENT THERETO; (B) MEANS FOR SEIZING A REGISTER-SENDER FOR TEST PURPOSES AND FOR TRANSMITTING THERETO SAID TEST ADDRESS DATA; (C) AND, MEANS, CONTROLLED BY SAID SEIZING MEANS AND BY SAID SETTABLE MEANS FOR PREVENTING SAID REGISTERSENDER FROM PERFORMING SAID SWITCHING CONTROL FUNCTIONS UNLESS AID REGISTERED COMPLETE SET OF SWITCHING DATA CORRESPONDS TO SAID CORRECT SET THEREOF. 